Oscar winner Ron Bass (My Best Friend's Wedding) will adapt the script.
The London-set comedy is about a godmother of four without children of her own who tries to help her friends with family problems and discovers a new side of herself.
Halcyon's head of development Camille Gatin brought in the book and Ron Bass.
'Halcyon is building an exciting slate of high-quality projects includingThe Godmother. We plan to be in production on our first film since Funny Games (Haneke's recent English-language remake) by the end of the year,' Halcyon CEO Coen said.
Halcyon has also taken UK rights to FG Cottam's psychological thriller The House Of Lost Souls, about a journalist who has to return to a troubled house, which was a former haunt of Aleistair Crowley. Dario Poloni is adapting the screenplay.